Every business has a cycle: money goes out to pay for materials, stock, staff or services, then returns when customers pay. The length of that cycle determines how much cash the business needs to operate. A shorter cycle frees cash; a longer cycle ties it up.
Understanding your cash conversion cycle helps you find practical ways to improve cash flow without increasing sales.
The three parts of the cycle
The cash conversion cycle is often described using three measures:
- Days inventory: how long stock or work in progress is held before it is sold or delivered.
- Days receivable: how long customers take to pay after a sale.
- Days payable: how long you take to pay suppliers.
In simple terms, the cycle equals days inventory plus days receivable minus days payable.
A simple example
Imagine a business holds stock for forty days, customers pay thirty days after purchase and suppliers are paid after twenty days. The cycle is forty plus thirty minus twenty, which equals fifty days. For fifty days, the business has paid out cash that has not yet returned.
The longer this period, the more working capital the business needs.
Service businesses have cycles too
Service businesses may hold little stock, but they still have cycles. Time spent working on a project before invoicing, plus the time clients take to pay, ties up cash in the form of wages, subcontractors and the founder's own time.
Shorten days inventory
For product businesses, holding less stock, ordering more frequently, focusing on faster-selling products and clearing slow stock can reduce days inventory. For service businesses, invoicing at milestones rather than at the end of a project reduces the time work remains unbilled.
Shorten days receivable
Clear payment terms, deposits, staged payments, prompt invoicing, convenient payment methods and consistent follow-up all help customers pay faster.
For service businesses, invoicing at milestones rather than at the end of a project reduces the time work remains unbilled.
Lengthen days payable responsibly
Negotiating reasonable payment terms with suppliers can improve cash flow. However, paying suppliers late without agreement damages relationships and reputation. Aim for fair terms agreed in advance.
Measure your cycle
Use your accounting records to estimate each measure. Even rough estimates are useful. Recalculate every quarter and watch whether the cycle is shortening or lengthening.
A practical tool: the cycle calculator
Create a small sheet with three inputs: average days stock or work is held, average days customers take to pay and average days you take to pay suppliers. The sheet calculates the cycle and estimates how much cash is tied up by multiplying the cycle by your average daily costs. Test how changes, such as ten days faster customer payment, would free cash.
Questions to shorten the cycle
Ask: Could we invoice earlier or in stages? Could we request deposits? Which customers pay slowly, and why? Which stock sells slowly? Could suppliers offer longer terms in exchange for reliable ordering? Each answer may reveal a way to release cash.
Common mistakes
Businesses often ignore the cycle until cash runs short, hold large amounts of slow-moving stock, invoice only at the end of long projects or stretch supplier payments without agreement. Others never measure the cycle. Understanding and regularly measuring it reveals practical improvements.
An example in practice
A furniture maker held materials for months and invoiced customers only on delivery. Her cycle was over ninety days. She began ordering materials per project, requesting a forty percent deposit and invoicing the balance at delivery with seven-day terms. Her cycle fell to about thirty days, freeing a significant amount of cash she had previously borrowed to cover.
The cycle during growth
When sales grow, a long cycle multiplies the cash required. If a business with a fifty-day cycle doubles its sales, it needs roughly twice as much cash tied up in stock and unpaid invoices. Shortening the cycle before growing is one of the safest ways to fund growth without borrowing.